The image on the left shows this during the construction of the bridge over the thames at westminster.
The Institution of Engineering and Technology is registered as a Charity in England & Wales (no 211014) and Scotland (no SC038698)
Today, it is listed on the London Stock Exchange and employs 6,600 people in the UK (2018).In fact, the main change to the bridge from the original design is the handrail on the bridge, which was added to facilitate the Queen Mother’s frequent trips to the College.Scaled down, the footbridge at Iffley Lock is a simplified copy of Queens’ Bridge.The bridge at Iffley wasn’t built until 1924 and was designed by Chief Engineer, Griffith John Griffiths (1873-1940).Griffiths simplified design was also constructed in teak and paid for by the Thames Conservancy.The joinery at Queens’ has the tangents broken into multiple short lengths with scarf joints: whereas at Iffley each tangent consists of only two lengths of wood bolted together side-by-side at the central arch.This change means that the Iffley bridge does not satisfy the 18th century design intention that individual timbers could be replaced without dismantling the bridge.There are other differences at Iffley with its separated radials and cross-beam steel plates support design.The bridge at Iffley also inspired a copy – duplicated in oak by Winchester College for a footbridge connecting Palmer Field across the water meadows.The bridge at Winchester was dismantled in 1976 but you can still see where the abutments are today.We have to include this section to debunk common truth-less concoctions that we hear on the river, almost daily!There is a further commonly told myth that the bridge was originally designed by Sir Isaac Newton.This is not true. If you have ever been on the river you’ll spot the building – named after its designer – The Essex Building.The rebuild work was trusted to and completed by another local builder, Mr. William Sindall.The rebuild kept to the original design switching the wood choice and types of bolt.The main changes were replacement of the oak timbers with the teak ones which exist today and a change to coach-bolts passing through each joint.And what of William Sindall’s local building company? Please use the videos below for detailed instructions or, alternatively, download the PDF